編集中 MacBook Airの画面が真っ暗で何も表示されない

最後に翻訳されてから長い時間が経過しています。

変更の表示

	* Is your screen lighting up? Try powering on in a dark room for easier observation. If the screen is lighting, it is getting some
	Pro Tip:** Pre-2018 Airs sport a white Apple logo on the lid use the display backlight for illumination. If the Apple lights up, your backlight works
-	* If you have no signs of backlight, check for an image on screen by shining a flashlight at your display. No backlight and no display means you’re sitting squarely in hardware territory.
-	Pro Tip:** This is easiest to spot during boot up. The high contrast between the on screen Apple logo and the background significantly increases visibility.
+	* If you have no signs of backlight, check for an image on the screen by shining a flashlight at your display. No backlight and no display means you’re sitting squarely in hardware territory.
+	Pro Tip:** This is easiest to spot during boot-up. The high contrast between the on-screen Apple logo and the background significantly increases visibility.
	Bonus Pro Tip:** If your Air has the aforementioned white Apple logo on the lid, shine a light through it to emulate your backlight. Can you see an image now?
-	* Close and open your display. Check for changes in display behavior at different angles or when you move the lid. Differences in image or backlight with display angle generally ~~indicates~~ a faulty cable. For Retina Airs, check the [[MacBook Air Black Screen#Section_Faulty_Flex_Cables\|display flex cables\|new_window=true]]. ~~Previous~~ iterations, check the [[MacBook Air Black Screen#Section_LVDS_Cable\|LVDS cable\|new_window=true]].
-	* No image or backlight? Connect your Mac to an external display. You will need [product\|IF179-083\|a dock\|new_window=true], or a Thunderbolt adapter to accomplish this. If you get a normal looking image on the external monitor, graphics processing is working properly.
-	* Getting trackpad click, but nothing else? See if the Caps Lock LED lights when you press the key. If no, you may have a [[MacBook Air Black Screen#Section_Firmware_Corruption\|firmware issue]].
+	* Close and open your display. Check for changes in display behavior at different angles or when you move the lid. Differences in image or backlight with display angle generally indicate a faulty cable. For Retina Airs, check the [[MacBook Air Black Screen#Section_Faulty_Flex_Cables\|display flex cables\|new_window=true]]. For previous iterations, check the [[MacBook Air Black Screen#Section_LVDS_Cable\|LVDS cable\|new_window=true]].
+	* No image or backlight? Connect your Mac to an external display. You will need [product\|IF179-083\|a dock\|new_window=true], or a Thunderbolt adapter to accomplish this. If you get a normal-looking image on the external monitor, graphics processing is working properly.
+	* Getting trackpad click, but nothing else? See if the Caps Lock LED lights when you press the key. If not, you may have a [[MacBook Air Black Screen#Section_Firmware_Corruption\|firmware issue]].
	[comment]solutions[/comment]

	== Buggy Software ==

-	Keeping track of the information on your MacBook is hard work. Data is constantly being written, overwritten, accessed or deleted. Often following an update or power loss, data records may change in ways that are unintentional. This is commonly called data corruption. Even without corruption, software may contain flaws that result in unexpected behavior–including your blank display.
+	Keeping track of the information on your MacBook is hard work. Data is constantly being written, overwritten, accessed, or deleted. Often following an update or power loss, data records may change in ways that are unintentional. This is commonly called data corruption. Even without corruption, software may contain flaws that result in unexpected behavior–including your blank display.

	* Power down your Mac and try to [guide\|157469\|launch into Safe Mode\|new_window=true]. A reboot after entering Safe Mode may be sufficient. Some OS repairs are done as part of this process.

	** If errors were repaired, restart your Mac and see if the issue is resolved.
	* Reinstall, or upgrade your operating system using Recovery Mode. You can also use a [guide\|66371\|bootable USB installer\|new_window=true] if you have access to another Mac.
-	* If all else fails, make sure you have a backup or come to terms with losing whatever you have stored currently. Erase your drive and reinstall the OS on the newly erased drive..
+	* If all else fails, make sure you have a backup or come to terms with losing whatever you have stored currently. Erase your drive and reinstall the OS on the newly erased drive.

	*Note:* If you do not have a backup, or are not willing to erase the drive, you [guide\|155945\|still have options\|new_window=true].

	== Firmware Corruption ==

-	If your MacBook Air is from 2018 or newer, it’s possible your MacBook encountered an error or lost power when it was updating the firmware. This might make it appear as though it’s not outputting an image, when it just doesn’t have the directions to boot up properly. Direct Firmware Upgrade or DFU mode can help to diagnose or solve this issue.
+	If your MacBook Air is from 2018 or newer, it’s possible your MacBook encountered an error or lost power when it was updating the firmware. This might make it appear as though it’s not outputting an image when it just doesn’t have the directions to boot up properly. Direct Firmware Upgrade or DFU mode can help to diagnose or solve this issue.

	* Press and hold the power button for a solid twenty seconds. Release the button, wait a few seconds, and attempt to power it on again. This will force a normal boot attempt if your device was inadvertently put into DFU mode.
-	* To reinstall a known good copy of the firmware, you will need a second Mac that can run [link\|https://apps.apple.com/app/id1037126344\|++Apple Configurator 2++] and a USB C cable.
-	* Follow the [link\|https://support.apple.com/guide/apple-configurator-mac/revive-or-restore-an-intel-based-mac-apdebea5be51/mac\|++Apple Support page++] to get your Mac into DFU mode. You may need to disconnect and reconnect the cable between the two Macs to get Configurator to recognize the device.
-	Note:** The [link\|https://support.apple.com/guide/apple-configurator-mac/revive-or-restore-a-mac-with-apple-silicon-apdd5f3c75ad/mac\|++procedure for Macs with Apple Silicon processors++] varies slightly.
+	* To reinstall a known good copy of the firmware, you will need a second Mac that can run [link\|https://apps.apple.com/app/id1037126344\|Apple Configurator 2] and a USB C cable.
+	* Follow the [link\|https://support.apple.com/guide/apple-configurator-mac/revive-or-restore-an-intel-based-mac-apdebea5be51/mac\|Apple Support page] to get your Mac into DFU mode. You may need to disconnect and reconnect the cable between the two Macs to get Configurator to recognize the device.
+	Note:** The [link\|https://support.apple.com/guide/apple-configurator-mac/revive-or-restore-a-mac-with-apple-silicon-apdd5f3c75ad/mac\|procedure for Macs with Apple Silicon processors] varies slightly.
	* Attempt a revive first. This will install a new copy of the device firmware. You should get an Apple logo on the device screen at some point during this process. If you do not, your issue is likely the display itself.
	* If the Revive is unsuccessful, ensure you have a good backup and try a Restore.
	Note: This will reinitialize the internal storage. Your data will be erased**, you may also need to [guide\|119499\|reinstall the operating system\|new_window=true] depending on the device model.
-	* If you encounter an error during this process, try a different USB cable, internet connection, or both. If you are still unsuccessful, head over to the [link\|https://www.ifixit.com/Answers\|++Answers Forum++] where you can get some more individual assistance. Make note of any error codes you get. They can help diagnose the underlying issue.
+	* If you encounter an error during this process, try a different USB cable, internet connection, or both. If you are still unsuccessful, head over to the [link\|https://www.ifixit.com/Answers\|Answers Forum] where you can get some more individual assistance. Make note of any error codes you get. They can help diagnose the underlying issue.

	== Damaged or Faulty Display ==

	As laptops have continued to get thinner, the likelihood of damage to your display has increased dramatically. Visible damage can be harder to spot than you expect depending on its severity and location. Even without damage, the display may not work properly due to internal faults, damaged or not.

-	* Look closely at your display for signs of break. Changing your viewing angle may help catch small hairline cracks. .
-	** On 2018 and newer models, be sure to check the glass bezel below the display. I can be cracked without damaging the display panel itself and ~~sever~~ or ~~puncture~~ the fragile cables beneath it. Knock out a line that carries power and your whole display goes kaput.
+	* Look closely at your display for signs of a break. Changing your viewing angle may help catch small hairline cracks.
+	** On 2018 and newer models, be sure to check the glass bezel below the display. It can be cracked without damaging the display panel itself and severing or puncturing the fragile cables beneath it. Knock out a line that carries power and your whole display goes kaput.
	* Check internal cables for signs of tears or other damage. Pay special attention to the cables leading from the TCON board to the display, or through hinges. They are especially prone to failure.
-	* If you find damage, or software fixes have not made a difference, replacing the display is the most likely solution. Use the [[Topic:MacBook Air\|appropriate Guide\|new_window=true]] for your model. iFixit may even carry the [link\|https://www.ifixit.com/Parts/MacBook_Air/Screens\|++replacement screen++]!
+	* If you find damage or software fixes have not made a difference, replacing the display is the most likely solution. Use the [[Topic:MacBook Air\|appropriate Guide\|new_window=true]] for your model. iFixit may even carry the [link\|https://www.ifixit.com/Parts/MacBook_Air/Screens\|replacement screen]!

	== Faulty Flex Cables ==

-	Starting with the 2018 MacBook Air, Apple integrated the display design from the MacBook Pro into the redesigned Air. Well documented issues with this new layout were observed heavily in the repair community triggering a controversy known as [link\|https://www.ifixit.com/News/16943/macbook-pro-flexgate-repair-program\|“Flexgate.”] This is much more prevalent in the 2016 and 2017 Pro models, but cable tears occur in all models using this design
+	Starting with the 2018 MacBook Air, Apple integrated the display design from the MacBook Pro into the redesigned Air. Well-documented issues with this new layout were observed heavily in the repair community triggering a controversy known as [link\|https://www.ifixit.com/News/16943/macbook-pro-flexgate-repair-program\|“Flexgate.”] This is much more prevalent in the 2016 and 2017 Pro models, but cable tears occur in all models using this design

	* These cables are a common fault due to repeat tension from opening and closing the screen. They are also prone to trapping debris that falls in the gap in the hinge area resulting in small cable punctures. This may also be referred to as “Dust Gate.”

	* Even though [product\|IF123-139\|the cables\|new_window=true] are the faulty part, the [link\|https://www.ifixit.com/Search?doctype=guide&query=MacBook%20Air%20Screen%20Replacement\|most common fix] is replacing the entire [link\|https://www.ifixit.com/Parts/MacBook_Air/Screens\|display assembly].
	* The cables themselves are extremely difficult to replace. One end is soldered to the TCON board. The other end leads under the back of the display panel, which is not intended to be removed independently.
-	* Some folks [link\|https://www.youtube.com/watch?v=OGKucaMJEAc\|repair the cables with microsoldering], but this is not a repair for the faint of heart, or the inexperienced. They can also face the same failure since soldered-on jumper wires don’t flex the same way as the cables they seek to repair
+	* Some folks [link\|https://www.youtube.com/watch?v=OGKucaMJEAc\|repair the cables with microsoldering], but this is not a repair for the faint of heart or the inexperienced. They can also face the same failure since soldered-on jumper wires don’t flex the same way as the cables they seek to repair

	== Faulty Internal Display Cable ==

	=== eDP Cable ===

-	* The Embedded DisplayPort or eDP cable used in Retina MacBook Airs is short, rigid and unlikely to go bad by itself, but reseating the cable connection is still a good idea. For extra thoroughness, address the logic board side of the cable as well as the TCON board side.
+	* The Embedded DisplayPort or eDP cable used in Retina MacBook Airs is short, rigid, and unlikely to go bad by itself, but reseating the cable connection is still a good idea. For extra thoroughness, address the logic board side of the cable as well as the TCON board side.
	* Liquid damage in this area can spell bad news due to high voltage levels on backlight power lines. Check closely for signs of corrosion or liquid exposure around the connectors if your issue began following a spill.
	* If you note signs of moisture, be sure to inspect inside the connector. Both the connections on the TCON board and the connector on the rear of the logic board could be affected. Inspect closely, and thoroughly if you are concerned this might be your issue.


	* Reseat the connector on the logic board to start. Inspect the connector for pin damage or stuck debris.
-	* Verify the cable hasn’t gotten pinched in the hinges of the display or sustained any other damage. An off kilter display or improperly routed cable can cause progressive wear, or sever the cable altogether.
+	* Verify the cable hasn’t gotten pinched in the hinges of the display or sustained any other damage. An off-kilter display or improperly routed cable can cause progressive wear, or sever the cable altogether.
	* Due to the proximity to the edge of the device, these connectors are a hot spot for liquid damage. Be sure to inspect for corrosion if you suspect liquid may have come into play.

	== Malfunctioning Hall Sensors ==

-	Few people think about the technology used to detect whether their laptop display is open or closed–it’s less sophisticated than you might suspect. Magnets present in the bezel of the display, or mounted to the display hinge are detected by small sensors mounted in the chassis of the laptop. The lid closes, these Hall Effect Sensors (often shortened to Hall Sensors) see a magnetic field, the device gets the cue to sleep. Vice versa when you open it back up–simple, right? Despite the relative simplicity of the mechanism, they can still fail in a number of ways.
+	Few people think about the technology used to detect whether their laptop display is open or closed–it’s less sophisticated than you might suspect. Magnets present in the bezel of the display, or mounted to the display hinge are detected by small sensors mounted in the chassis of the laptop. The lid closes, these Hall Effect Sensors (often shortened to Hall Sensors) see a magnetic field, and the device gets the cue to sleep. Vice versa when you open it back up–simple, right? Despite the relative simplicity of the mechanism, they can still fail in a number of ways.

	* To test for this issue, see if you can use magnets to trigger the wake signal by running them along the left or right sides of the MacBook’s housing.

	Skip this step** if you're on the 2022 MacBook Air. It uses a slightly different mechanism.
	* Airs are much more commonly affected by this issue. Their logic boards are often much smaller than their Pro counterparts and rely on sensors in peripherals rather than on the board. More connections means more points of failure.
-	** 2017 and earlier model MacBook Airs have their sensor mounted on the Input/Output or I/O board. The signal also runs through the trackpad in some models, so a bad [link\|https://www.ifixit.com/Parts/MacBook_Air?filter%5Bfacet_tags.Item%20Type%5D=Trackpads\|trackpad~~\|new_window=true~~], or [link\|https://www.ifixit.com/Parts/MacBook_Air?q=trackpad&filter%5Bfacet_tags.Item%20Type%5D=Cables\|trackpad cable~~\|new_window=true~~] can also interfere with Hall Sensor function.
-	** 2018-2020 MacBook Airs feature one sensor in their [link\|https://www.ifixit.com/Parts/MacBook_Air?q=microphone\|microphone array~~\|new_window=true~~], and the other in the [link\|https://www.ifixit.com/Parts/MacBook_Air?q=right%20speaker\|right speaker~~\|new_window=true~~].
+	** 2017 and earlier model MacBook Airs have their sensor mounted on the Input/Output or I/O board. The signal also runs through the trackpad in some models, so a bad [link\|https://www.ifixit.com/Parts/MacBook_Air?filter%5Bfacet_tags.Item%20Type%5D=Trackpads\|trackpad], or [link\|https://www.ifixit.com/Parts/MacBook_Air?q=trackpad&filter%5Bfacet_tags.Item%20Type%5D=Cables\|trackpad cable] can also interfere with Hall Sensor function.
+	** 2018-2020 MacBook Airs feature one sensor in their [link\|https://www.ifixit.com/Parts/MacBook_Air?q=microphone\|microphone array], and the other in the [link\|https://www.ifixit.com/Parts/MacBook_Air?q=right%20speaker\|right speaker].

	{table

	=== Faulty Lid Angle Sensor ===

-	The 2022 (and presumably future versions of all MacBooks) make use of a dedicated Lid Angle Sensor Cable. It is a a bit smarter than the more "Yes" or "No" status of older style sensors. Like the 2019 16" MacBook Pro, this model uses a dedicated sensor to detect more specific data about lid angle. The magnet here is mounted to the display hinge and rotates as the display is opened or closed.
+	The 2022 (and presumably future versions of all MacBooks) make use of a dedicated Lid Angle Sensor Cable. It is a bit smarter than the more "Yes" or "No" status of older style sensors. Like the 2019 16" MacBook Pro, this model uses a dedicated sensor to detect more specific data about lid angle. The magnet here is mounted to the display hinge and rotates as the display is opened or closed.

	* The tiny chip on this cable which is used to spot differences in magnetic field strength requires calibration from Apple to perform as expected. When the display is replaced by Apple, they also call for the Lid Angle Sensor to be replaced.
-	** This may be due to inability for existing chips to be calibrated to new displays, or [link\|https://www.ifixit.com/News/73288/m2-macbook-pro-screen-swaps-are-kinda-haunted\|perhaps Apple simply never prioritized developing a mechanism for this].
-	** The Lid Angle Sensor is commonly torn during display replacement. Its presence is easy to miss. Failure to disconnect it before removing the display could result in this kind of disaster. Be sure you follow Guides closely.
+	** This may be due to the inability for existing chips to be calibrated to new displays, or [link\|https://www.ifixit.com/News/73288/m2-macbook-pro-screen-swaps-are-kinda-haunted\|perhaps Apple simply never prioritized developing a mechanism for this].
+	** The Lid Angle Sensor is commonly torn during display replacement. Its presence is easy to miss. Failure to disconnect it before removing the display could result in this kind of disaster. Be sure you follow the Guides closely.
	* Issues with this cable can [post\|759262\|cause strange behavior on its attached display\|new_window=true] in other models that use this same method. A display may simply refuse to wake from sleep, or power on at all if this Lid Angle Sensor isn't providing data.
	* You may experience issues with your screen, even if you replace this cable. The chip on this cable requires calibration. A chip without its programming doesn't know how to interpret any data it is getting, so behavior may be erratic.

	== Liquid Damage ==

-	Liquid in your electronics can wreak havoc on any system it touches. Aside from lack of power, lack of image or backlight is one of the most common MacBook issues resulting from spill. If at any point, even a little bit of liquid got into your machine and rolled into the wrong spot, you could end up with display problems or worse.
+	Liquid in your electronics can wreak havoc on any system it touches. Aside from lack of power, lack of image or backlight is one of the most common MacBook issues resulting from the spill. If at any point, even a little bit of liquid got into your machine and rolled into the wrong spot, you could end up with display problems or worse.

-	* Liquid damage can affect MacBooks having image issues in three key areas: around the backlight circuit, the display connector and on the TCON board.
+	* Liquid damage can affect MacBooks having image issues in three key areas: around the backlight circuit, the display connector, and on the TCON board.
	* Liquid damage indicators will almost always be positioned near display components. They don’t tell the whole story, but if one has been triggered, it’s a good clue.
	* Even if you don’t know much about circuit board design, backlight circuits appear in similar places and layouts on nearly all MacBooks. They typically rely on a large number of capacitors in a row. They will be near the display connector on older MacBook Airs.
-	* Assume any liquid damage near a display connector will have involved backlight, especially if your computer was on when the damage occurred.
+	* Assume any liquid damage near a display connector will have involved the backlight, especially if your computer was on when the damage occurred.

	== Logic Board ==

	The logic board is the hub for the vast majority of a MacBook’s functionality. Any number of the small components on the board may have failed or become damaged. Logic board fault is a safe assumption of cause if nothing else on this page has worked.

-	* Check for obvious signs of a board issue - burned or cracked components, liquid residue, corrosion or bend. If there are signs of liquid, there’s still hope your Mac can be resurrected.
+	* Check for obvious signs of a board issue - burned or cracked components, liquid residue, corrosion, or bend. If there are signs of liquid, there’s still hope your Mac can be resurrected.
	* [link\|https://www.ifixit.com/Search?doctype=guide&query=MacBook%20Air%20Logic%20Board%20Replacement\|Replacing the logic board] is often the most practical solution for a DIYer whose board has failed. If you’re stuck in this pickle, and you need your data [guide\|155945\|you still have options\|new_window=true].
	* If you’re feeling especially motivated, the tiny components on the board can be repaired with microsoldering. It is an art unto itself, but a worthy endeavor for those who are adventurous. If you’re curious and want to know more about getting into micro soldering, here’s some [link\|https://www.ifixit.com/News/6911/micro-soldering-mom\|good reading] and some [link\|https://youtube.com/playlist?list=PL4INaL5vWobD_CltiZXr7K46oJ33KvwBt\|good watching] to get you started.

英語

ページタイトル

表示タイトル

概要

Does your MacBook Air power on, but you're not getting anything on screen? Frustrated by a blank display or unresponsive screen? Take a look at these fixes!

追加情報

Have you ever booted your MacBook Air and found it unresponsive? If you have encountered a black or white screen while restarting or booting up your MacBook, or you’re simply getting nothing on screen at all, don't panic, it’s possible you’ll even be able to solve your issue without the need for a costly repair.

If your Mac doesn’t seem like it’s powering on, you may want to head over to [[MacBook Will Not Turn On|the troubleshooting page for that|new_window=true]] instead.

== First Steps ==

It’s easy to forget some troubleshooting basics amidst frustration. Before undertaking any of the more time consuming solutions below, these are a few fundamentals to get you started.

* Perform a hard reset. Press and hold your power button for fifteen seconds, then release. Wait a few seconds, and try to power on again. This may correct any minor hang ups in the startup process or resolve a stuck update.
* Connect, or reconnect your charger. Try a different port if you have multiple. This may kick the device out of sleep, or power it on if other methods are not working.
* Turn up your brightness settings. Display brightness can be adjusted up or down with the ***F2*** or ***F1*** keys***,*** respectively.
* Disconnect any peripherals. Docks and multi-port hubs are notoriously problematic, especially if they have many items connected.
* [[How to reset NVRAM and PRAM on a Mac|Reset the PRAM or NVRAM|new_window=true]]. These are terms for a small amount of memory which contains system settings for the Mac, including brightness and display resolution.
* [[How to reset the SMC on a Mac|Reset the System Management Controller|new_window=true]] (or SMC). This can clear any bunk startup settings, or resolve issues where your Mac is stuck in sleep.

=== Triage ===

Troubleshooting is a process that often resembles medical diagnosis. Certain information can help hone in on a specific problem. Try these tests to point yourself in the right direction.

* Move your cursor around, especially towards the corners, or edges of the display. Try to get menus to appear. If you're getting any sort of pointer, your display hardware is working properly. Have a look at [[MacBook Air Black Screen#Section_Buggy_Software|software fixes]].
* Is your screen lighting up? Try powering on in a dark room for easier observation. If the screen is lighting, it is getting some
** ***Pro Tip:*** Pre-2018 Airs sport a white Apple logo on the lid use the display backlight for illumination. If the Apple lights up, your backlight works
* If you have no signs of backlight, check for an image on the screen by shining a flashlight at your display. No backlight and no display means you’re sitting squarely in hardware territory.
** ***Pro Tip:*** This is easiest to spot during boot-up. The high contrast between the on-screen Apple logo and the background significantly increases visibility.
** ***Bonus Pro Tip:*** If your Air has the aforementioned white Apple logo on the lid, shine a light through it to emulate your backlight. Can you see an image now?
* Close and open your display. Check for changes in display behavior at different angles or when you move the lid. Differences in image or backlight with display angle generally indicate a faulty cable. For Retina Airs, check the [[MacBook Air Black Screen#Section_Faulty_Flex_Cables|display flex cables|new_window=true]]. For previous iterations, check the [[MacBook Air Black Screen#Section_LVDS_Cable|LVDS cable|new_window=true]].
* No image or backlight? Connect your Mac to an external display. You will need [product|IF179-083|a dock|new_window=true], or a Thunderbolt adapter to accomplish this. If you get a normal-looking image on the external monitor, graphics processing is working properly.
* Getting trackpad click, but nothing else? See if the Caps Lock LED lights when you press the key. If not, you may have a [[MacBook Air Black Screen#Section_Firmware_Corruption|firmware issue]].
[comment]solutions[/comment]

== Buggy Software ==

Keeping track of the information on your MacBook is hard work. Data is constantly being written, overwritten, accessed, or deleted. Often following an update or power loss, data records may change in ways that are unintentional. This is commonly called data corruption. Even without corruption, software may contain flaws that result in unexpected behavior–including your blank display.

* Power down your Mac and try to [guide|157469|launch into Safe Mode|new_window=true]. A reboot after entering Safe Mode may be sufficient. Some OS repairs are done as part of this process.
* See if you get an image in Recovery Mode. Once there, [guide|52680|repair the file system|new_window=true]. Using [guide|119437|Internet Recovery|new_window=true] is best since this does not rely on access to the disk you’re repairing.
** If errors were repaired, restart your Mac and see if the issue is resolved.
* Reinstall, or upgrade your operating system using Recovery Mode. You can also use a [guide|66371|bootable USB installer|new_window=true] if you have access to another Mac.
* If all else fails, make sure you have a backup or come to terms with losing whatever you have stored currently. Erase your drive and reinstall the OS on the newly erased drive.

***Note:*** If you do not have a backup, or are not willing to erase the drive, you [guide|155945|still have options|new_window=true].

== Firmware Corruption ==

If your MacBook Air is from 2018 or newer, it’s possible your MacBook encountered an error or lost power when it was updating the firmware. This might make it appear as though it’s not outputting an image when it just doesn’t have the directions to boot up properly. Direct Firmware Upgrade or DFU mode can help to diagnose or solve this issue.

* Press and hold the power button for a solid twenty seconds. Release the button, wait a few seconds, and attempt to power it on again. This will force a normal boot attempt if your device was inadvertently put into DFU mode.
* To reinstall a known good copy of the firmware, you will need a second Mac that can run [link|https://apps.apple.com/app/id1037126344|Apple Configurator 2] and a USB C cable.
* Follow the [link|https://support.apple.com/guide/apple-configurator-mac/revive-or-restore-an-intel-based-mac-apdebea5be51/mac|Apple Support page] to get your Mac into DFU mode. You may need to disconnect and reconnect the cable between the two Macs to get Configurator to recognize the device.
** ***Note:*** The [link|https://support.apple.com/guide/apple-configurator-mac/revive-or-restore-a-mac-with-apple-silicon-apdd5f3c75ad/mac|procedure for Macs with Apple Silicon processors] varies slightly.
* Attempt a revive first. This will install a new copy of the device firmware. You should get an Apple logo on the device screen at some point during this process. If you do not, your issue is likely the display itself.
* If the Revive is unsuccessful, ensure you have a good backup and try a Restore.
** ***Note:*** This will reinitialize the internal storage. Your data ***will be erased***, you may also need to [guide|119499|reinstall the operating system|new_window=true] depending on the device model.
* If you encounter an error during this process, try a different USB cable, internet connection, or both. If you are still unsuccessful, head over to the [link|https://www.ifixit.com/Answers|Answers Forum] where you can get some more individual assistance. Make note of any error codes you get. They can help diagnose the underlying issue.

== Damaged or Faulty Display ==

As laptops have continued to get thinner, the likelihood of damage to your display has increased dramatically. Visible damage can be harder to spot than you expect depending on its severity and location. Even without damage, the display may not work properly due to internal faults, damaged or not.

* Look closely at your display for signs of a break. Changing your viewing angle may help catch small hairline cracks.
** On 2018 and newer models, be sure to check the glass bezel below the display. It can be cracked without damaging the display panel itself and severing or puncturing the fragile cables beneath it. Knock out a line that carries power and your whole display goes kaput.
* Check internal cables for signs of tears or other damage. Pay special attention to the cables leading from the TCON board to the display, or through hinges. They are especially prone to failure.
* If you find damage or software fixes have not made a difference, replacing the display is the most likely solution. Use the [[Topic:MacBook Air|appropriate Guide|new_window=true]] for your model. iFixit may even carry the [parts|MacBook Air|replacement screen|itemtype=screens]!

== Faulty Flex Cables ==

Starting with the 2018 MacBook Air, Apple integrated the display design from the MacBook Pro into the redesigned Air. Well-documented issues with this new layout were observed heavily in the repair community triggering a controversy known as [link|https://www.ifixit.com/News/16943/macbook-pro-flexgate-repair-program|“Flexgate.”] This is much more prevalent in the 2016 and 2017 Pro models, but cable tears occur in all models using this design

* These cables are a common fault due to repeat tension from opening and closing the screen. They are also prone to trapping debris that falls in the gap in the hinge area resulting in small cable punctures. This may also be referred to as “Dust Gate.”
* Inspect the cables for tears or dimples. Even minor damage could cause problems. Tears are common where they may rub against the edge of the TCON board. Pockmarks from dust will typically be hidden in the crevices.
** Retina airs often get damage in the cables
* Even though [product|IF123-139|the cables|new_window=true] are the faulty part, the [link|https://www.ifixit.com/Search?doctype=guide&query=MacBook%20Air%20Screen%20Replacement|most common fix] is replacing the entire [parts|MacBook Air|display assembly|itemtype=screens].
* The cables themselves are extremely difficult to replace. One end is soldered to the TCON board. The other end leads under the back of the display panel, which is not intended to be removed independently.
* Some folks [link|https://www.youtube.com/watch?v=OGKucaMJEAc|repair the cables with microsoldering], but this is not a repair for the faint of heart or the inexperienced. They can also face the same failure since soldered-on jumper wires don’t flex the same way as the cables they seek to repair

== Faulty Internal Display Cable ==

The cable which connects the logic board to the display is an uncommon fault, but as Adam Savage once said, “Failure is always an option.”

=== eDP Cable ===

* The Embedded DisplayPort or eDP cable used in Retina MacBook Airs is short, rigid, and unlikely to go bad by itself, but reseating the cable connection is still a good idea. For extra thoroughness, address the logic board side of the cable as well as the TCON board side.
* Liquid damage in this area can spell bad news due to high voltage levels on backlight power lines. Check closely for signs of corrosion or liquid exposure around the connectors if your issue began following a spill.
* If you note signs of moisture, be sure to inspect inside the connector. Both the connections on the TCON board and the connector on the rear of the logic board could be affected. Inspect closely, and thoroughly if you are concerned this might be your issue.

=== LVDS Cable ===

Pre-2018 MacBook Airs make use of a different display cable type. Low-Voltage Differential Signaling, or LVDS, is a communications standard often used for analog transmission of video signals.

* Reseat the connector on the logic board to start. Inspect the connector for pin damage or stuck debris.
* Verify the cable hasn’t gotten pinched in the hinges of the display or sustained any other damage. An off-kilter display or improperly routed cable can cause progressive wear, or sever the cable altogether.
* Due to the proximity to the edge of the device, these connectors are a hot spot for liquid damage. Be sure to inspect for corrosion if you suspect liquid may have come into play.

== Malfunctioning Hall Sensors ==

Few people think about the technology used to detect whether their laptop display is open or closed–it’s less sophisticated than you might suspect. Magnets present in the bezel of the display, or mounted to the display hinge are detected by small sensors mounted in the chassis of the laptop. The lid closes, these Hall Effect Sensors (often shortened to Hall Sensors) see a magnetic field, and the device gets the cue to sleep. Vice versa when you open it back up–simple, right? Despite the relative simplicity of the mechanism, they can still fail in a number of ways.

* To test for this issue, see if you can use magnets to trigger the wake signal by running them along the left or right sides of the MacBook’s housing.
** You may want to see if you can locate the magnets in the display with the same sort of method. Run the magnet along the left and right edges of the display, to map the magnets' location.
** ***Skip this step*** if you're on the 2022 MacBook Air. It uses a slightly different mechanism.
* Airs are much more commonly affected by this issue. Their logic boards are often much smaller than their Pro counterparts and rely on sensors in peripherals rather than on the board. More connections means more points of failure.
** 2017 and earlier model MacBook Airs have their sensor mounted on the Input/Output or I/O board. The signal also runs through the trackpad in some models, so a bad [parts|MacBook Air|trackpad|params=filter%5Bfacet_tags.Item%20Type%5D=Trackpads], or [parts|MacBook Air|trackpad cable|params=q=trackpad&filter%5Bfacet_tags.Item%20Type%5D=Cables] can also interfere with Hall Sensor function.
** 2018-2020 MacBook Airs feature one sensor in their [parts|MacBook Air|microphone array|params=q=microphone], and the other in the [parts|MacBook Air|right speaker|params=q=right%20speaker].

{table
| [image|2854873|size=medium|align=center]
| [image|2854872|size=medium|align=center]
}

=== Faulty Lid Angle Sensor ===

The 2022 (and presumably future versions of all MacBooks) make use of a dedicated Lid Angle Sensor Cable. It is a bit smarter than the more "Yes" or "No" status of older style sensors. Like the 2019 16" MacBook Pro, this model uses a dedicated sensor to detect more specific data about lid angle. The magnet here is mounted to the display hinge and rotates as the display is opened or closed.

* The tiny chip on this cable which is used to spot differences in magnetic field strength requires calibration from Apple to perform as expected. When the display is replaced by Apple, they also call for the Lid Angle Sensor to be replaced.
** This may be due to the inability for existing chips to be calibrated to new displays, or [link|https://www.ifixit.com/News/73288/m2-macbook-pro-screen-swaps-are-kinda-haunted|perhaps Apple simply never prioritized developing a mechanism for this].
** The Lid Angle Sensor is commonly torn during display replacement. Its presence is easy to miss. Failure to disconnect it before removing the display could result in this kind of disaster. Be sure you follow the Guides closely.
* Issues with this cable can [post|759262|cause strange behavior on its attached display|new_window=true] in other models that use this same method. A display may simply refuse to wake from sleep, or power on at all if this Lid Angle Sensor isn't providing data.
* You may experience issues with your screen, even if you replace this cable. The chip on this cable requires calibration. A chip without its programming doesn't know how to interpret any data it is getting, so behavior may be erratic.
** If you need to replace this cable, your best bet is to use a replacement part harvested from another Mac. Then you can be sure the cable has been programmed. Even if the values in its calibration don't match exactly, it's better than no programming at all. The [product|IF188-178|iFixit part|new_window=true] has the Lid Angle Sensor for the 2022 Air attached to its original display.
** If you are proficient at microsoldering, you can transplant the chip from the old sensor cable to the new one to be sure the programming will match the original screen, but this is not necessary.

== Liquid Damage ==

Liquid in your electronics can wreak havoc on any system it touches. Aside from lack of power, lack of image or backlight is one of the most common MacBook issues resulting from the spill. If at any point, even a little bit of liquid got into your machine and rolled into the wrong spot, you could end up with display problems or worse.

* Liquid damage can affect MacBooks having image issues in three key areas: around the backlight circuit, the display connector, and on the TCON board.
* Liquid damage indicators will almost always be positioned near display components. They don’t tell the whole story, but if one has been triggered, it’s a good clue.
* Even if you don’t know much about circuit board design, backlight circuits appear in similar places and layouts on nearly all MacBooks. They typically rely on a large number of capacitors in a row. They will be near the display connector on older MacBook Airs.
* Assume any liquid damage near a display connector will have involved the backlight, especially if your computer was on when the damage occurred.

== Logic Board ==

The logic board is the hub for the vast majority of a MacBook’s functionality. Any number of the small components on the board may have failed or become damaged. Logic board fault is a safe assumption of cause if nothing else on this page has worked.

* Check for obvious signs of a board issue - burned or cracked components, liquid residue, corrosion, or bend. If there are signs of liquid, there’s still hope your Mac can be resurrected.
* [link|https://www.ifixit.com/Search?doctype=guide&query=MacBook%20Air%20Logic%20Board%20Replacement|Replacing the logic board] is often the most practical solution for a DIYer whose board has failed. If you’re stuck in this pickle, and you need your data [guide|155945|you still have options|new_window=true].
* If you’re feeling especially motivated, the tiny components on the board can be repaired with microsoldering. It is an art unto itself, but a worthy endeavor for those who are adventurous. If you’re curious and want to know more about getting into micro soldering, here’s some [link|https://www.ifixit.com/News/6911/micro-soldering-mom|good reading] and some [link|https://youtube.com/playlist?list=PL4INaL5vWobD_CltiZXr7K46oJ33KvwBt|good watching] to get you started.
* If you don’t want to undertake this yourself, your local repair shop may be able to help! Ask them if they offer this sort of repair, or can recommend someone who does.
[comment]conclusion[/comment]

== Additional Resources ==

* [link|https://support.apple.com/en-us/HT201295|MacBook Black Screen T2 Chip]
* [link|https://support.apple.com/guide/mac-help/if-your-display-is-dark-mchlbbeb27af/mac|MacBook Display Dark]
* [link|https://support.apple.com/en-us/HT210905#:~:text=Intel%20processor-,Press%20and%20hold%20the%20power%20button%20for%20about%2010%20seconds,20%20seconds%2C%20contact%20Apple%20Support.|MacBook Startup Black Screen]

== Related Answers ==

* [post|107882|MacBook Pro: External display works, LCD display not recognized|new_window=true]

[br]

日本語

[title|MacBook Airの画面が真っ暗で何も表示されない]

[summary]MacBook Airの電源は入るのに、画面には何も表示されませんか？真っ暗なディスプレイや反応しない画面にイライラしていませんか？これらの解決策をご覧ください！[/summary]

[summary_image|2970498]

MacBook Airを起動して、応答がないことに気づいたことはありませんか？MacBookの再起動や起動時に黒や白の画面が表示されたり、画面に何も表示されなかったりしても、慌てずに対処しましょう！高額な修理をしなくても問題を解決できる可能性があります。

Macの電源が入らない場合、代わりに[[MacBook Will Not Turn On|トラブルシューティングのページ|new_window=true]] にアクセスするとよいかもしれません。

== まず初めに ==

イライラしているうちに、トラブルシューティングの基本を忘れてしまうことがあります。以下のような時間のかかる解決策をとる前に、まずは基本的なことから始めてみてください。

* ハードリセットを実行します。電源ボタンを15秒間長押しし、その後離します。数秒待って、もう一度電源を入れます。これは、起動プロセスの任意のマイナーなハングアップを修正するか、またはスタックアップデートを解決することがあります。
* 充電器を接続するか、または再接続します。複数のポートがある場合は、別のポートを試してみてください。これは、他の方法が動作していない場合、デバイスをスリープからキック、または電源オンにすることがあります。
* あなたの明るさの設定を上げて下さい。ディスプレイの明るさは、それぞれ***F2***キーまたは***F1***キーで調整することができます。
* 周辺機器の接続を解除してください。ドックやマルチポートハブは、特に多くのアイテムが接続されている場合、問題があることが知られています。
* [[How to reset NVRAM and PRAM on a Mac|PRAMまたはNVRAMをリセットします|new_window=true]]。 これらは、明るさやディスプレイの解像度など、Macのシステム設定を含む少量のメモリを指す用語です。

* [[How to reset the SMC on a Mac|MacのSMCをリセットしてください|new_window=true]] 。この作業により、起動時の設定を消去したり、Macがスリープ状態になっている問題を解決することができます。

=== 障害の切り分け ===

トラブルシューティングは、しばしば医学的診断に類似したプロセスです。特定の情報を得ることで、特定の問題に焦点を当てることができます。正しい方向性を示すために、以下のテストを試してみてください。

* カーソルを動かして、特にディスプレイの隅や端の方に移動してみる。メニューが表示されるようにする。もし、何らかのポインタが表示されるのであれば、ディスプレイのハードウェアは正しく動作しています。[[MacBook Air Black Screen#Section_2|ソフトウェアの不具合]]を参照してください。
* 画面が光っていますか？暗い部屋で電源を入れると、観察しやすくなります。画面が点灯している場合、それはいくつかのヒントがあります。
** ***Proのヒント:*** 2018年以前のAirは、蓋に白いAppleロゴがあり、ディスプレイのバックライトで照明しています。Appleが点灯している場合は、バックライトが動作しています。
* バックライトの兆候がない場合、懐中電灯をディスプレイに当てて、画面上の画像を確認してください。バックライトがなく、ディスプレイもない場合は、ハードウェアの領域に入っていることを意味します。
** ***Proのヒント:*** これは、起動中に発見するのが最も簡単です。画面上のAppleロゴと背景のコントラストが高いため、視認性が大幅に向上します。
** ***ボーナスProのヒント:*** あなたのAirの蓋に前述の白いAppleロゴがある場合、バックライト代わりの強い光を当ててみてください。ディスプレイに表示された画像を見ることができますか？
* ディスプレイを閉じたり開いたりしてみてください。ディスプレイを閉じたり開いたりして、角度や蓋を動かしたときのディスプレイの挙動が変化していないか確認してください。ディスプレイの角度による画像やバックライトの違いは、一般的にケーブルの不具合を示しています。Retina Airの場合は、[[MacBook Air Black Screen#Section_Faulty_Flex_Cables|ディスプレイフレックスケーブル|new_window=true]] を確認してください。以前のバージョンでは、[[MacBook Air Black Screen#Section_LVDS_Cable|LVDS ケーブル|new_window=true]]をチェックしてください。
* 画像やバックライトが表示されない？Macを外部ディスプレイに接続してください。このためには[product|IF179-083|ドック|new_window=true] または Thunderbolt アダプタが必要です。外部モニターに正常な画像が表示されれば、グラフィック処理は正常に行われています。
* トラックパッドのクリックはあるが、それ以外は何もない。Caps Lockキーを押したときにキーについているLEDが点灯するかどうかを確認してください。点灯しない場合は、[[MacBook Air Black Screen#Section_Firmware_Corruption|ファームウェアの問題]]が発生している可能性があります。
[comment]解決策[/comment]

== ソフトウェアの不具合 ==

MacBookの情報を管理するのは大変な作業です。データは常に書き込まれ、上書きされ、アクセスされ、削除されています。アップデートや停電の後、データ記録が意図しない形で変化することがよくあります。これは一般的にデータ破損と呼ばれています。また、データ破損がなくても、ソフトウェアに欠陥があり、予期せぬ動作（ディスプレイが真っ白になるなど）を引き起こすことがあります。

* Macの電源を落とし、[guide|157469|セーフモードで起動|new_window=true]を試してみてください。セーフモードに入った後、再起動すれば十分な場合があります。このプロセスの一部として、いくつかのOSの修復が行われます。
* リカバリーモードで画像が出るかどうか確認してください。そこで [guide|52680|ファイルシステムの復元|new_window=true] を実行します。[guide|119437|インターネット復旧|new_window=true]を使用すると、修復するディスクへのアクセスに依存しないので最適です。
** エラーが修復された場合、Macを再起動して問題が解決されるかどうかを確認します。
* リカバリーモードを使用して、オペレーティングシステムを再インストール、またはアップグレードします。他の Mac にアクセスできる場合は、[guide|66371|起動可能なUSBインストーラー|new_window=true] を使用することもできます。
* 他のすべてが失敗した場合、バックアップを持っていることを確認するか、現在保存されているすべてのものを失うことを受け入れるようにします。ドライブを消去し、新しく消去したドライブにOSを再インストールしてください。

***注：***バックアップがない場合、またはドライブを消去したくない場合は、[guide|155945|MacBookからデータを回収する方法|new_window=true]を参照してください。

== ファームウェアの破損 ==

お使いのMacBook Airが2018年以降のものである場合、ファームウェアを更新する際にエラーが発生したり、電源が落ちたりした可能性があります。そのため、正しく起動するための指示がないだけなのに、あたかも画像を出力していないように見えることがあります。この問題を診断または解決するには、Direct Firmware Upgrade（DFU）モードが役立ちます。

* 電源ボタンを20秒間長押しします。電源ボタンを20秒間長押しし、数秒間待ってから電源を入れ直す。これは、あなたのデバイスが不注意でDFUモードに置かれた場合、通常のブートを試みることを強制します。
* 正常なファームウェアを再インストールするには、[link|https://apps.apple.com/app/id1037126344|Apple Configurator 2|new_window=true]を実行できる2番目のMacとUSB Cケーブルが必要です。
* [link|https://support.apple.com/ja-jp/guide/apple-configurator-mac/apdebea5be51/mac|Apple サポートページ|new_window=true]に従って、Mac を DFU モードにします。Configuratorにデバイスを認識させるために、2台のMac間でケーブルの取り外しや再接続が必要な場合があります。
** ***注意:*** Apple Siliconプロセッサを搭載したMacの場合、[link|https://support.apple.com/ja-jp/guide/apple-configurator-mac/apdd5f3c75ad/mac|手順|new_window=true]は若干異なります。
* 最初に復活を試みてください。これにより、デバイスのファームウェアの新しいコピーがインストールされます。このプロセスのある時点で、デバイスの画面にアップルロゴが表示されるはずです。そうでない場合は、ディスプレイ自体に問題がある可能性が高いです。
* 復活がうまくいかない場合は、バックアップをしっかり取って、復元を試してください。
** ***注：***この作業により、内部ストレージが再初期化されます。つまり、***ストレージ内のデータは全て消去***されます。デバイスのモデルによっては、[guide|119499|OSの再インストール|new_window=true]が必要な場合があります。
* このプロセスでエラーが発生した場合は、別のUSBケーブル、インターネット接続、またはその両方を試してみてください。それでもうまくいかない場合は、個別サポートを受けるために[link|https://www.ifixit.com/Answers|アンサーフォーラム|new_window=true]にアクセスしてみましょう。エラーコードが表示されたら、メモしておいてください。根本的な問題を診断するのに役立ちます。

== ディスプレイの破損や不具合について ==

ノートパソコンの薄型化に伴い、ディスプレイが破損する可能性は飛躍的に高まっています。目に見える損傷は、その程度や場所によっては、予想以上に発見しにくい場合があります。また、損傷がなくても、内部の故障により、ディスプレイが正常に動作しない場合もあります。

* ディスプレイの破損の兆候をよく見てください。見る角度を変えることで、小さなヘアライン状のひび割れを捉えることができる場合があります。.
** 2018年以降のモデルでは、ディスプレイの下にあるガラスベゼルを必ず確認してください。ディスプレイパネル自体にダメージを与えずにガラスベゼルが割れてしまい、その下にある壊れやすいケーブルを切断したり、穴を開けてしまうことがあります。電源を供給するラインが切れてしまうと、ディスプレイ全体が故障してしまいます。
* 内部ケーブルに裂け目や損傷がないかを確認します。特に、TCONボードからディスプレイにつながるケーブルや、ヒンジを貫通するケーブルには注意が必要です。これらのケーブルは特に破損が発生しやすくなっています。
* 損傷を発見した場合、またはソフトウェアの修正で変化がない場合、ディスプレイを交換することが最も可能性の高い解決策となります。iFixit では、[parts|MacBook Air|交換用のスクリーン|itemtype=screens|new_window=true]を扱っている場合もあります！

== フレックスケーブルの不具合について ==

2018年のMacBook Airから、AppleはMacBook Proのディスプレイ周りの設計を再設計されたAirに取り入れました。この新しいレイアウトに関するよく知られた問題は、修理コミュニティで大きく観察され、[link|https://www.ifixit.com/News/16943/macbook-pro-flexgate-repair-program|"Flexgate"|new_window=true]として知られる論争を引き起こしました。これは、2016年および2017年のProモデルでより一般的ですが、ケーブルの断裂は、この設計を使用しているすべてのモデルで発生します。

* このケーブルは、スクリーンの開閉によるテンションの繰り返しによる故障が発生しやすくなっています。また、ヒンジ部分の隙間に落ちたゴミを挟み込みやすいため、結果としてケーブルに小さな穴が開いてしまうこともあります。これは、"ダストゲート "とも呼ばれます。
* ケーブルに破れやくぼみがないか、点検してください。小さな損傷でも、問題を引き起こす可能性があります。破れは、TCONボードのエッジと擦れるような場所によく見られます。埃による痘痕は、通常、隙間に隠れます。
** Retinaディスプレイ仕様のMacBook Airには、このケーブルに破損があることが多いです。
* [product|IF123-139|ケーブル|new_window=true]が欠陥部品であるにもかかわらず、[link|https://www.ifixit.com/Search?doctype=guide&query=MacBook%20Air%20Screen%20Replacement|最も一般的な修理手順|new_window=true]では、[parts|MacBook Air|ディスプレイアセンブリ|itemtype=screens|new_window=true]を交換することになります。
* ケーブルだけを交換するのは非常に困難です。一端はTCONボードにはんだ付けされています。もう一方の端は、ディスプレイパネルの裏側につながっており、単独で取り外すことは想定していません。
* 一部の人々は[link|https://www.youtube.com/watch?v=OGKucaMJEAc|マイクロソルダリングでケーブルを修理します]が、これは自信のない人や経験の浅い人のための修理ではありません。また、はんだ付けされたジャンパー線は、修理しようとするケーブルと同じようには曲がらないので、同じ故障に直面することがあります。

== 内部ディスプレイケーブルの不具合 ==

ロジックボードとディスプレイをつなぐケーブルの故障は珍しいですが、[https://ja.wikipedia.org/wiki/%E6%80%AA%E3%81%97%E3%81%84%E4%BC%9D%E8%AA%AC|かつてアダム・サヴェッジが言った|new_window=true]ように、"失敗はつきもの "です。

[comment]
“Failure is always an option.”は上記リンクにあるTV番組「怪しい伝説」（原題は”MythBusters”）で、司会者の一人Adam Savageが言った言葉としてネットミーム化してるようです。
日本語吹き替え版での訳語が上記で正しいかどうかは確認できていません。
少なくとも日本では知らない人が多そうなネタや番組なので一応リンクを貼っておきましたが、（このコメント共々）必要かどうかは疑問が残るかと思います。
[/comment]

=== eDPケーブル ===

* Retina MacBook Airに使用されているEmbedded DisplayPort（eDP）ケーブルは短く、剛性が高いため、この部品自体が故障することはまずありませんが、ケーブル接続を再確認することは良いアイデアです。ケーブルのロジックボード側と、TCONボード側にも手を入れてください。
* バックライトの電源ラインには高い電圧がかかっているため、この部分に液体が付着すると、悪い影響が出ることがあります。液体をこぼした後に問題が発生した場合は、コネクタの周りに腐食の兆候や液体の露出がないかよく確認してください。
* 水分の痕跡がある場合は、コネクタの内部を点検してください。TCONボード上の接続とロジックボード背面の接続の両方が影響を受けている可能性があります。TCONボード上の接続部とロジックボード背面の接続部の両方が影響を受ける可能性があります。細かい部分まで漏れのないように確認を行って下さい。

=== LVDSケーブル ===

2018年よりも前のMacBook Airでは、異なるタイプのディスプレイケーブルが使用されています。LVDS（Low-Voltage Differential Signaling）は、ビデオ信号のアナログ伝送によく使用される通信規格です。

* ロジックボード上のコネクタを一度外して接続し直します。ピンの損傷やゴミが詰まっていないか、コネクタを点検してください。
* ケーブルがディスプレイのヒンジに挟まれたり、他の損傷を受けたりしていないことを確認してください。ディスプレイが傾いていたり、ケーブルが不適切に配線されていると、摩耗が進行したり、ケーブルが完全に切断されたりすることがあります。
* デバイスの端に近いため、これらのコネクタは液体によるダメージのホットスポットとなります。液体がかかったと思われる場合は、必ず腐食していないか点検してください。

== ホールセンサーの不具合について ==

ノートパソコンのディスプレイが開いているか閉じているかを検知するための技術について考える人は少ないでしょう。ディスプレイのベゼルにある磁石、またはディスプレイのヒンジに取り付けられた磁石を、ノートパソコンのシャーシに取り付けられた小さなセンサーが検出します。蓋が閉まると、ホール効果センサー（しばしばホールセンサーと略されます）が磁場を感知し、デバイスはスリープの合図を受け取ります。逆に、蓋を開けるとスリープから復帰する、というシンプルな仕組みです。しかし、その仕組みは比較的シンプルですが、さまざまな点で不具合が生じる可能性があります。

* この問題を調べるには、MacBookの筐体の左右どちらかの端に沿って磁石を動かし、スリープから復帰するかどうかを確認します。
** 同じような方法で、ディスプレイの磁石の位置を確認することもできます。ディスプレイの左右の縁に沿って磁石を走らせ、磁石の位置を確認してください。
** 2022 MacBook Airをお使いの方は、***このステップを飛ばしてください***。少し異なるメカニズムが使われています。
* MacBook Airでは、この問題が起きやすい傾向があります。ロジックボードがMacBook Proに比べてずっと小さいことが多く、センサーがロジックボード上ではなく別の場所にあることが多いためです。接続が多ければ多いほど、故障のポイントも多くなります。
** 2017年以前のモデルのMacBook Airは、センサーがInput/OutputまたはI/Oボードに搭載されています。ホールセンサーの信号は一部のモデルではトラックパッドも経由するため、[parts|MacBook Air|トラックパッド|new_window=true|params=filter%5Bfacet_tags.Item%20Type%5D=Trackpads]、[parts|MacBook Air|トラックパッドケーブル|new_window=true|params=q=trackpad&filter%5Bfacet_tags.Item%20Type%5D=Cables] が悪いとホールセンサーの機能を妨害することもあります。
** 2018-2020 MacBook Airは、1つのセンサーを[parts|MacBook Air|マイクアレイ|new_window=true|params=q=microphone]に、もう1つを[parts|MacBook Air|右スピーカー|new_window=true|params=q=right%20speaker]に備えています。

{table
| [image|2854873|size=medium|align=center]
| [image|2854872|size=medium|align=center]
}

=== リッドアングルセンサーの不具合 ===

2022（およびおそらく将来のすべてのMacBook）には、専用のリッドアングルセンサーケーブルが使用されています。これは、古いスタイルのセンサーの「はい」または「いいえ」の状態よりも少し賢くなっています。2019年の16インチMacBook Proと同様に、このモデルも専用のセンサーを使って、ディスプレイを開く角度に関するより具体的なデータを検出します。こちらのマグネットはディスプレイのヒンジに取り付けられていて、ディスプレイの開閉に伴って回転します。

* このケーブルに搭載されている磁界強度の違いを見抜くための小さなチップは、期待通りの性能を発揮するためにAppleによるキャリブレーションが必要です。Appleでディスプレイを交換する際、リッドアングルセンサーも交換するよう要請されます。
** これは、既存のチップを新しいディスプレイに合わせて調整できないためか、あるいはよりありそうな話としては [link|https://www.ifixit.com/News/73288/m2-macbook-pro-screen-swaps-are-kinda-haunted|Appleがそのような仕組みを開発することを優先していなかった]のどちらかであろうと思われます。
** ディスプレイの交換時に、リッドアングルセンサーが破れることがよくあります。その存在は見逃されがちです。ディスプレイを取り外す前にこのセンサーを外さなければ、このような災難に見舞われる可能性があります。ガイドをしっかり守るようにしましょう。
* このケーブルの問題は、同じ方式を採用している他のモデルで [post|759262|付属ディスプレイに奇妙な動作をさせる|new_window=true] ことがあります。このリッドアングルセンサーがデータを送信しない場合、ディスプレイがスリープから復帰しない、または電源が全く入らないことがあります。
* 画面に発生した問題はこのケーブルを交換した後も発生する可能性があります。このケーブルに搭載されているチップはキャリブレーションが必要です。プログラミングされていないチップは、取得したデータをどのように解釈するか分からないため、動作が不安定になる可能性があります。
** このケーブルを交換する必要がある場合、最善の方法は、他のMacから取り外した交換部品を使用することです。そうすれば、ケーブルがプログラムされていることを確認することができます。キャリブレーションの値が正確に一致しなくても、プログラミングをしないよりはましです。 [product|IF188-178|iFixitで販売している交換用ディスプレイアセンブリ|new_window=true] には、元のディスプレイに装着されていた2022 Air用のリッドアングルセンサーも装着されています。
** マイクロソルダリングに習熟していれば、センサーチップを古いセンサーケーブルから新しいセンサーケーブルに移植して、確実に元のスクリーンと同じようにプログラミングされているようにすることもできますが、これは必要ではありません。

== 液体によるダメージ ==

電子機器についた液体は、それが触れたすべてのシステムに大惨事をもたらす可能性があります。電源不足はもちろん、画像やバックライトの不足は、液体がこぼれたことによるMacBookの最も一般的な問題の1つです。もし、ある時点で、ほんの少しでも液体がマシンに入り、間違った場所に転がってしまった場合、ディスプレイの問題やそれ以上の事態に陥る可能性があります。

* 以下の3つの重要部品の周辺に液体による損傷が発生した場合、MacBookに画像表示関連の問題が起きる可能性があります。その重要部品とは、バックライト回路、ディスプレイコネクタ、TCONボードです。
* 液体損傷インジケータは、ほとんどの場合、ディスプレイコンポーネントの近くに配置されます。このインジケーターですべてがわかるわけではありませんが、もしインジケーターが作動したなら、それは良い手がかりとなります。
* 回路基板の設計をよく知らなかったとしても、バックライト回路は大抵のMacBookで同じような場所と部品配置なので簡単に見分けられます。通常、多数のキャパシタ（コンデンサ）が一列に並んでいます。古いMacBook Airでは、ディスプレイコネクタの近くにあるはずです。
* ディスプレイコネクタ付近の液体による損傷があった場合は、バックライト回路にも損傷があると考えて下さい（特に、損傷が発生したときにコンピュータの電源が入っていた場合）。

== ロジックボード ==

ロジックボードは、MacBookの機能の大部分を司るハブです。ボード上の小さな部品が故障または損傷している可能性があります。ここまでに紹介した対策に効果がなかった場合、ロジックボードの故障が問題の原因かも知れないと安全に仮定できます。

* ボードの問題の明らかな兆候をチェックします - 焦げや割れがあるコンポーネント、液体の残留物、腐食または曲がりなど。液体が付着した形跡があったとしても、Macが復活する可能性はあります。
* [link|https://www.ifixit.com/Search?doctype=guide&query=MacBook%20Air%20Logic%20Board%20Replacement|ロジックボードの交換]は、ボードが故障したDIYerにとって、しばしば最も現実的な解決策となります。もし、このような状況に陥ってしまい、データが必要な場合 [guide|155945|データを回収する手段|new_window=true]はあります。
* もし、あなたが特にやる気があるのなら、基板上の小さな部品はマイクロソルダリングで修理することができます。これはそれ自体が芸術ですが、冒険好きな人には価値のある試みです。もしあなたが好奇心旺盛で、マイクロソルダリングについてもっと知りたいなら、ここに [link|https://www.ifixit.com/News/6911/micro-soldering-mom|参考記事] と [link|https://youtube.com/playlist?list=PL4INaL5vWobD_CltiZXr7K46oJ33KvwBt|解説動画] を紹介しますので、参考にしてください。
* 自分でやるのはちょっと...という方は、お近くの修理工場がお手伝いしてくれるかもしれません！このような修理を行っているかどうか、または修理を行っている人を紹介してもらえるかどうか聞いてみてください。
[comment]conclusion[/comment]

== 追加資料 ==

* [link|https://support.apple.com/en-us/HT201295|MacBookブラックスクリーンT2チップ]です。
* [link|https://support.apple.com/guide/mac-help/if-your-display-is-dark-mchlbbeb27af/mac|Apple公式サイト：MacBookのディスプレイが暗い場合]
* [link|https://support.apple.com/en-us/HT210905#:~:text=Intel%20processor-,Press%20and%20hold%20the%20power%20button%20for%20about%2010%20seconds,20%20seconds%2C%20contact%20Apple%20Support.|MacBook Startup Black Screen]を参照。

== 関連する回答 ==

* [post|107882|MacBook Pro： 外部ディスプレイは動作するが、液晶ディスプレイは認識されない|new_window=true]。